O'Brien Castle on Inisheer, Aran Islands

Oir, Inisheer, Co. Galway, Ireland

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Description

Caisleán Uí Bhriain or O'Brien Castle, is a touristic sight to see on the island of Inisheer, the smallest island of the Aran Islands in Ireland. Built in 1585 on the island's highest point, this tower house was constructed within the remains of a ring fort called Dún Formna, dating from as early as the 1st century AD.

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